1 files changed, 19 insertions, 0 deletions
diff --git a/257/CH8/EX8.4/example_8_4.sce b/257/CH8/EX8.4/example_8_4.sce
new file mode 100644
index 000000000..2eb74881b
--- /dev/null
+++ b/257/CH8/EX8.4/example_8_4.sce
@@ -0,0 +1,19 @@
+s=%s;
+//F=s^5+s^4+2*s^3+2*s^2+3*s+15//
+//replacing 's' by '1/z' we get F//
+z=%z;
+F=15*z^5+3*z^4+2*z^3+2*z^2+z+1;
+disp(routh_t(F)) 
+r=coeff(F)
+routh=routh_t(F)
+n=length(r)
+c=0;
+for i=1:n
+if (routh(i,1)<0)
+c=c+1;
+ end 
+  end
+  if(c>=1)
+    printf("system is unstable")
+  else printf("system is stable")
+  end